Don’t worry if you cannot run all the features, so long as the script doesn’t report any FATAL errors

You should not run any other iptables firewall configuration script. For example, if you previously used APF+BFD you can remove the combination (which you will need to do if you have them installed otherwise they will conflict):

sh /usr/local/csf/bin/remove_apf_bfd.sh

That’s it. You can then configure csf and lfd by reading the documentation and configuration files in /etc/csf/csf.conf and /etc/csf/readme.txt directly or through the csf User Interface.

csf installation for cPanel and DirectAdmin is preconfigured to work on those servers with all the standard ports open.

You should ensure that kernel logging daemon (klogd) is enabled. Typically, VPS servers running RedHat/CentOS v5 have this disabled and you should check /etc/init.d/syslog and make sure that any klogd lines are not commented out. If you change the file, remember to restart syslog.

See the csf.conf and readme.txt files for more information.

Uninstallation ============== Removing csf and lfd is even more simple: